./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longer-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:38:15,976 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:38:16,116 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:38:16,126 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:38:16,127 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:38:16,171 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:38:16,172 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:38:16,173 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:38:16,174 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:38:16,180 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:38:16,181 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:38:16,181 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:38:16,182 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:38:16,185 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:38:16,185 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:38:16,186 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:38:16,187 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:38:16,187 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:38:16,188 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:38:16,188 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:38:16,189 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:38:16,190 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:38:16,190 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:38:16,191 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:38:16,191 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:38:16,192 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:38:16,192 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:38:16,194 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:38:16,194 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:38:16,195 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:38:16,197 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:38:16,197 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:38:16,197 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:38:16,198 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:38:16,198 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:38:16,199 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:38:16,199 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:38:16,199 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:38:16,200 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:38:16,200 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:38:16,200 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:38:16,201 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:38:16,201 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 [2023-11-24 21:38:16,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:38:16,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:38:16,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:38:16,671 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:38:16,672 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:38:16,673 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread/stack_longer-1.i [2023-11-24 21:38:20,113 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:38:20,484 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:38:20,485 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/sv-benchmarks/c/pthread/stack_longer-1.i [2023-11-24 21:38:20,514 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/data/e5b121713/9e9a11df8d824c3395c283d8e60f4af2/FLAG947e4448f [2023-11-24 21:38:20,532 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/data/e5b121713/9e9a11df8d824c3395c283d8e60f4af2 [2023-11-24 21:38:20,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:38:20,538 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:38:20,540 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:38:20,540 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:38:20,547 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:38:20,548 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:38:20" (1/1) ... [2023-11-24 21:38:20,549 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a37e143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:20, skipping insertion in model container [2023-11-24 21:38:20,550 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:38:20" (1/1) ... [2023-11-24 21:38:20,618 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:38:21,294 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/sv-benchmarks/c/pthread/stack_longer-1.i[41527,41540] [2023-11-24 21:38:21,334 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:38:21,351 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:38:21,406 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/sv-benchmarks/c/pthread/stack_longer-1.i[41527,41540] [2023-11-24 21:38:21,432 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:38:21,535 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:38:21,536 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:21 WrapperNode [2023-11-24 21:38:21,537 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:38:21,538 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:38:21,539 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:38:21,539 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:38:21,550 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:21" (1/1) ... [2023-11-24 21:38:21,588 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:21" (1/1) ... [2023-11-24 21:38:21,628 INFO L138 Inliner]: procedures = 278, calls = 41, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 161 [2023-11-24 21:38:21,629 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:38:21,630 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:38:21,630 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:38:21,631 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:38:21,651 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:21" (1/1) ... [2023-11-24 21:38:21,651 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:21" (1/1) ... [2023-11-24 21:38:21,658 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:21" (1/1) ... [2023-11-24 21:38:21,682 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 5, 3, 2, 2]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0, 0]. The 4 writes are split as follows [0, 0, 2, 1, 1]. [2023-11-24 21:38:21,682 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:21" (1/1) ... [2023-11-24 21:38:21,683 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:21" (1/1) ... [2023-11-24 21:38:21,699 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:21" (1/1) ... [2023-11-24 21:38:21,708 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:21" (1/1) ... [2023-11-24 21:38:21,712 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:21" (1/1) ... [2023-11-24 21:38:21,715 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:21" (1/1) ... [2023-11-24 21:38:21,721 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:38:21,722 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:38:21,723 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:38:21,723 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:38:21,724 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:21" (1/1) ... [2023-11-24 21:38:21,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:38:21,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:38:21,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:38:21,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:38:21,848 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-24 21:38:21,848 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-24 21:38:21,850 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-24 21:38:21,850 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-24 21:38:21,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:38:21,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:38:21,851 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 21:38:21,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:38:21,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:38:21,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:38:21,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:38:21,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:38:21,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:38:21,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:38:21,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:38:21,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:38:21,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:38:21,858 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 21:38:21,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:38:21,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:38:21,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:38:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:38:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:38:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:38:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:38:21,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:38:21,864 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:38:22,165 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:38:22,168 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:38:22,631 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:38:23,053 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:38:23,053 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 21:38:23,054 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:38:23 BoogieIcfgContainer [2023-11-24 21:38:23,054 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:38:23,059 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:38:23,059 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:38:23,064 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:38:23,064 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:38:20" (1/3) ... [2023-11-24 21:38:23,065 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@631b052e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:38:23, skipping insertion in model container [2023-11-24 21:38:23,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:38:21" (2/3) ... [2023-11-24 21:38:23,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@631b052e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:38:23, skipping insertion in model container [2023-11-24 21:38:23,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:38:23" (3/3) ... [2023-11-24 21:38:23,068 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2023-11-24 21:38:23,080 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-24 21:38:23,094 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:38:23,095 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-24 21:38:23,095 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:38:23,201 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 21:38:23,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 36 transitions, 86 flow [2023-11-24 21:38:23,290 INFO L124 PetriNetUnfolderBase]: 5/34 cut-off events. [2023-11-24 21:38:23,290 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:38:23,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 34 events. 5/34 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 70 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 30. Up to 3 conditions per place. [2023-11-24 21:38:23,307 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 36 transitions, 86 flow [2023-11-24 21:38:23,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 32 transitions, 73 flow [2023-11-24 21:38:23,348 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:38:23,357 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@76970f14, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:38:23,357 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-24 21:38:23,370 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:38:23,370 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2023-11-24 21:38:23,371 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 21:38:23,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:23,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:23,373 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 21:38:23,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:23,380 INFO L85 PathProgramCache]: Analyzing trace with hash 2102362180, now seen corresponding path program 1 times [2023-11-24 21:38:23,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:23,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962217947] [2023-11-24 21:38:23,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:23,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:24,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:24,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962217947] [2023-11-24 21:38:24,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962217947] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:24,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:24,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:38:24,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547806379] [2023-11-24 21:38:24,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:24,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:38:24,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:24,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:38:24,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:38:24,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2023-11-24 21:38:24,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:24,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:24,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2023-11-24 21:38:24,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:24,527 INFO L124 PetriNetUnfolderBase]: 360/690 cut-off events. [2023-11-24 21:38:24,528 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-11-24 21:38:24,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1336 conditions, 690 events. 360/690 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3236 event pairs, 82 based on Foata normal form. 46/686 useless extension candidates. Maximal degree in co-relation 1175. Up to 375 conditions per place. [2023-11-24 21:38:24,550 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 48 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-11-24 21:38:24,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 58 transitions, 236 flow [2023-11-24 21:38:24,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:38:24,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:38:24,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2023-11-24 21:38:24,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2023-11-24 21:38:24,572 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 92 transitions. [2023-11-24 21:38:24,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 92 transitions. [2023-11-24 21:38:24,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:24,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 92 transitions. [2023-11-24 21:38:24,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:24,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:24,590 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:24,593 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 73 flow. Second operand 4 states and 92 transitions. [2023-11-24 21:38:24,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 58 transitions, 236 flow [2023-11-24 21:38:24,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 58 transitions, 227 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:38:24,604 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 84 flow [2023-11-24 21:38:24,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-11-24 21:38:24,615 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-11-24 21:38:24,616 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 84 flow [2023-11-24 21:38:24,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:24,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:24,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:24,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:38:24,618 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 21:38:24,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:24,619 INFO L85 PathProgramCache]: Analyzing trace with hash -175873598, now seen corresponding path program 1 times [2023-11-24 21:38:24,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:24,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702430218] [2023-11-24 21:38:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:24,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:24,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:24,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702430218] [2023-11-24 21:38:24,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702430218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:24,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:24,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:38:24,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142142102] [2023-11-24 21:38:24,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:24,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:38:24,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:24,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:38:24,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:38:24,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2023-11-24 21:38:24,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:24,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:24,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2023-11-24 21:38:24,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:25,140 INFO L124 PetriNetUnfolderBase]: 355/667 cut-off events. [2023-11-24 21:38:25,141 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-24 21:38:25,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1402 conditions, 667 events. 355/667 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2994 event pairs, 135 based on Foata normal form. 11/633 useless extension candidates. Maximal degree in co-relation 1024. Up to 415 conditions per place. [2023-11-24 21:38:25,154 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 34 selfloop transitions, 2 changer transitions 3/45 dead transitions. [2023-11-24 21:38:25,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 45 transitions, 191 flow [2023-11-24 21:38:25,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:38:25,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:38:25,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2023-11-24 21:38:25,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2023-11-24 21:38:25,160 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 64 transitions. [2023-11-24 21:38:25,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 64 transitions. [2023-11-24 21:38:25,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:25,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 64 transitions. [2023-11-24 21:38:25,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:25,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:25,166 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:25,166 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 84 flow. Second operand 3 states and 64 transitions. [2023-11-24 21:38:25,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 45 transitions, 191 flow [2023-11-24 21:38:25,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 45 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:38:25,172 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 94 flow [2023-11-24 21:38:25,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-11-24 21:38:25,176 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2023-11-24 21:38:25,176 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 94 flow [2023-11-24 21:38:25,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:25,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:25,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:25,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:38:25,179 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 21:38:25,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:25,180 INFO L85 PathProgramCache]: Analyzing trace with hash 295937743, now seen corresponding path program 1 times [2023-11-24 21:38:25,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:25,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219867717] [2023-11-24 21:38:25,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:25,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:25,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:25,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219867717] [2023-11-24 21:38:25,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219867717] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:38:25,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198581677] [2023-11-24 21:38:25,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:25,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:38:25,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:38:25,551 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:38:25,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:38:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:25,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:38:25,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:38:25,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:38:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:26,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:38:26,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:26,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198581677] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:38:26,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:38:26,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-24 21:38:26,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510044195] [2023-11-24 21:38:26,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:38:26,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:38:26,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:26,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:38:26,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:38:26,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2023-11-24 21:38:26,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 94 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:26,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:26,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2023-11-24 21:38:26,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:27,051 INFO L124 PetriNetUnfolderBase]: 1079/2071 cut-off events. [2023-11-24 21:38:27,051 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2023-11-24 21:38:27,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4312 conditions, 2071 events. 1079/2071 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 10892 event pairs, 83 based on Foata normal form. 0/1972 useless extension candidates. Maximal degree in co-relation 3738. Up to 408 conditions per place. [2023-11-24 21:38:27,075 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 142 selfloop transitions, 18 changer transitions 3/171 dead transitions. [2023-11-24 21:38:27,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 171 transitions, 753 flow [2023-11-24 21:38:27,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:38:27,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-24 21:38:27,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 275 transitions. [2023-11-24 21:38:27,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6365740740740741 [2023-11-24 21:38:27,085 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 275 transitions. [2023-11-24 21:38:27,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 275 transitions. [2023-11-24 21:38:27,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:27,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 275 transitions. [2023-11-24 21:38:27,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 22.916666666666668) internal successors, (275), 12 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:27,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 36.0) internal successors, (468), 13 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:27,096 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 36.0) internal successors, (468), 13 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:27,097 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 94 flow. Second operand 12 states and 275 transitions. [2023-11-24 21:38:27,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 171 transitions, 753 flow [2023-11-24 21:38:27,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 171 transitions, 751 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:38:27,109 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 239 flow [2023-11-24 21:38:27,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=239, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2023-11-24 21:38:27,111 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 19 predicate places. [2023-11-24 21:38:27,112 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 239 flow [2023-11-24 21:38:27,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:27,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:27,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:27,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:38:27,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:38:27,322 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 21:38:27,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:27,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1512753331, now seen corresponding path program 1 times [2023-11-24 21:38:27,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:27,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206435901] [2023-11-24 21:38:27,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:27,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:27,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:27,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206435901] [2023-11-24 21:38:27,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206435901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:27,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:27,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:38:27,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052728128] [2023-11-24 21:38:27,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:27,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:38:27,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:27,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:38:27,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:38:27,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2023-11-24 21:38:27,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 239 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:27,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:27,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2023-11-24 21:38:27,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:27,823 INFO L124 PetriNetUnfolderBase]: 633/1321 cut-off events. [2023-11-24 21:38:27,824 INFO L125 PetriNetUnfolderBase]: For 467/467 co-relation queries the response was YES. [2023-11-24 21:38:27,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2952 conditions, 1321 events. 633/1321 cut-off events. For 467/467 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 6539 event pairs, 222 based on Foata normal form. 60/1364 useless extension candidates. Maximal degree in co-relation 2825. Up to 607 conditions per place. [2023-11-24 21:38:27,840 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 44 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-11-24 21:38:27,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 317 flow [2023-11-24 21:38:27,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:38:27,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:38:27,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2023-11-24 21:38:27,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-24 21:38:27,843 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 63 transitions. [2023-11-24 21:38:27,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 63 transitions. [2023-11-24 21:38:27,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:27,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 63 transitions. [2023-11-24 21:38:27,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:27,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:27,846 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:27,846 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 239 flow. Second operand 3 states and 63 transitions. [2023-11-24 21:38:27,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 317 flow [2023-11-24 21:38:27,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 56 transitions, 293 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-11-24 21:38:27,869 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 180 flow [2023-11-24 21:38:27,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-11-24 21:38:27,872 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2023-11-24 21:38:27,872 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 180 flow [2023-11-24 21:38:27,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:27,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:27,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:27,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:38:27,883 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 21:38:27,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:27,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1018894772, now seen corresponding path program 1 times [2023-11-24 21:38:27,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:27,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441370215] [2023-11-24 21:38:27,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:27,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:28,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:28,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441370215] [2023-11-24 21:38:28,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441370215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:38:28,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:38:28,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:38:28,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859089475] [2023-11-24 21:38:28,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:38:28,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:38:28,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:28,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:38:28,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:38:28,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2023-11-24 21:38:28,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:28,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:28,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2023-11-24 21:38:28,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:29,007 INFO L124 PetriNetUnfolderBase]: 699/1437 cut-off events. [2023-11-24 21:38:29,007 INFO L125 PetriNetUnfolderBase]: For 534/534 co-relation queries the response was YES. [2023-11-24 21:38:29,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3322 conditions, 1437 events. 699/1437 cut-off events. For 534/534 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 7243 event pairs, 162 based on Foata normal form. 0/1414 useless extension candidates. Maximal degree in co-relation 2922. Up to 902 conditions per place. [2023-11-24 21:38:29,024 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 63 selfloop transitions, 5 changer transitions 3/79 dead transitions. [2023-11-24 21:38:29,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 79 transitions, 418 flow [2023-11-24 21:38:29,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:38:29,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:38:29,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2023-11-24 21:38:29,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-24 21:38:29,026 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 105 transitions. [2023-11-24 21:38:29,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 105 transitions. [2023-11-24 21:38:29,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:29,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 105 transitions. [2023-11-24 21:38:29,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:29,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:29,030 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:29,030 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 180 flow. Second operand 5 states and 105 transitions. [2023-11-24 21:38:29,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 79 transitions, 418 flow [2023-11-24 21:38:29,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 79 transitions, 407 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:38:29,038 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 212 flow [2023-11-24 21:38:29,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-11-24 21:38:29,042 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 22 predicate places. [2023-11-24 21:38:29,042 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 212 flow [2023-11-24 21:38:29,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:29,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:29,043 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:29,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:38:29,043 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 21:38:29,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:29,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1167501059, now seen corresponding path program 1 times [2023-11-24 21:38:29,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:29,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931251097] [2023-11-24 21:38:29,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:29,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:29,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:38:29,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931251097] [2023-11-24 21:38:29,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931251097] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:38:29,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655091648] [2023-11-24 21:38:29,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:29,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:38:29,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:38:29,852 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:38:29,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:38:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:38:30,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-24 21:38:30,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:38:30,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:38:30,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-24 21:38:30,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 32 [2023-11-24 21:38:30,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:30,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:38:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:38:30,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655091648] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:38:30,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:38:30,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2023-11-24 21:38:30,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357944429] [2023-11-24 21:38:30,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:38:30,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:38:30,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:38:30,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:38:30,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:38:30,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2023-11-24 21:38:30,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 212 flow. Second operand has 15 states, 15 states have (on average 12.133333333333333) internal successors, (182), 15 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:30,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:38:30,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2023-11-24 21:38:30,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:38:32,027 INFO L124 PetriNetUnfolderBase]: 1440/2936 cut-off events. [2023-11-24 21:38:32,027 INFO L125 PetriNetUnfolderBase]: For 1411/1411 co-relation queries the response was YES. [2023-11-24 21:38:32,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6700 conditions, 2936 events. 1440/2936 cut-off events. For 1411/1411 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 15391 event pairs, 234 based on Foata normal form. 6/2894 useless extension candidates. Maximal degree in co-relation 5733. Up to 415 conditions per place. [2023-11-24 21:38:32,059 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 181 selfloop transitions, 38 changer transitions 0/227 dead transitions. [2023-11-24 21:38:32,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 227 transitions, 1208 flow [2023-11-24 21:38:32,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-24 21:38:32,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-24 21:38:32,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 379 transitions. [2023-11-24 21:38:32,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554093567251462 [2023-11-24 21:38:32,063 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 379 transitions. [2023-11-24 21:38:32,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 379 transitions. [2023-11-24 21:38:32,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:38:32,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 379 transitions. [2023-11-24 21:38:32,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:32,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 36.0) internal successors, (720), 20 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:32,069 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 36.0) internal successors, (720), 20 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:32,069 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 212 flow. Second operand 19 states and 379 transitions. [2023-11-24 21:38:32,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 227 transitions, 1208 flow [2023-11-24 21:38:32,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 227 transitions, 1203 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:38:32,083 INFO L231 Difference]: Finished difference. Result has 80 places, 78 transitions, 506 flow [2023-11-24 21:38:32,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=506, PETRI_PLACES=80, PETRI_TRANSITIONS=78} [2023-11-24 21:38:32,085 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 46 predicate places. [2023-11-24 21:38:32,085 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 78 transitions, 506 flow [2023-11-24 21:38:32,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 12.133333333333333) internal successors, (182), 15 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:38:32,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:38:32,086 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:32,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:38:32,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:38:32,293 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-24 21:38:32,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:38:32,294 INFO L85 PathProgramCache]: Analyzing trace with hash 954371611, now seen corresponding path program 1 times [2023-11-24 21:38:32,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:38:32,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343590796] [2023-11-24 21:38:32,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:38:32,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:38:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:38:32,354 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 21:38:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:38:32,443 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 21:38:32,443 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 21:38:32,445 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-11-24 21:38:32,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-11-24 21:38:32,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-11-24 21:38:32,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-24 21:38:32,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-24 21:38:32,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-24 21:38:32,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:38:32,449 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:38:32,457 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-24 21:38:32,457 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-24 21:38:32,506 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre48 could not be translated [2023-11-24 21:38:32,508 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre50 could not be translated [2023-11-24 21:38:32,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 09:38:32 BasicIcfg [2023-11-24 21:38:32,524 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-24 21:38:32,525 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-24 21:38:32,525 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-24 21:38:32,525 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-24 21:38:32,526 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:38:23" (3/4) ... [2023-11-24 21:38:32,527 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-24 21:38:32,554 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre48 could not be translated [2023-11-24 21:38:32,555 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre50 could not be translated [2023-11-24 21:38:32,627 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/witness.graphml [2023-11-24 21:38:32,627 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-24 21:38:32,628 INFO L158 Benchmark]: Toolchain (without parser) took 12090.15ms. Allocated memory was 163.6MB in the beginning and 245.4MB in the end (delta: 81.8MB). Free memory was 121.0MB in the beginning and 108.5MB in the end (delta: 12.5MB). Peak memory consumption was 97.1MB. Max. memory is 16.1GB. [2023-11-24 21:38:32,628 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 163.6MB. Free memory is still 137.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 21:38:32,628 INFO L158 Benchmark]: CACSL2BoogieTranslator took 997.77ms. Allocated memory is still 163.6MB. Free memory was 121.0MB in the beginning and 90.9MB in the end (delta: 30.1MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2023-11-24 21:38:32,629 INFO L158 Benchmark]: Boogie Procedure Inliner took 90.93ms. Allocated memory is still 163.6MB. Free memory was 90.9MB in the beginning and 88.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 21:38:32,629 INFO L158 Benchmark]: Boogie Preprocessor took 91.20ms. Allocated memory is still 163.6MB. Free memory was 88.4MB in the beginning and 85.4MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 21:38:32,630 INFO L158 Benchmark]: RCFGBuilder took 1332.36ms. Allocated memory was 163.6MB in the beginning and 203.4MB in the end (delta: 39.8MB). Free memory was 85.4MB in the beginning and 148.4MB in the end (delta: -62.9MB). Peak memory consumption was 32.0MB. Max. memory is 16.1GB. [2023-11-24 21:38:32,630 INFO L158 Benchmark]: TraceAbstraction took 9465.58ms. Allocated memory was 203.4MB in the beginning and 245.4MB in the end (delta: 41.9MB). Free memory was 147.4MB in the beginning and 116.9MB in the end (delta: 30.5MB). Peak memory consumption was 73.4MB. Max. memory is 16.1GB. [2023-11-24 21:38:32,631 INFO L158 Benchmark]: Witness Printer took 102.05ms. Allocated memory is still 245.4MB. Free memory was 116.9MB in the beginning and 108.5MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-24 21:38:32,634 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 163.6MB. Free memory is still 137.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 997.77ms. Allocated memory is still 163.6MB. Free memory was 121.0MB in the beginning and 90.9MB in the end (delta: 30.1MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 90.93ms. Allocated memory is still 163.6MB. Free memory was 90.9MB in the beginning and 88.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 91.20ms. Allocated memory is still 163.6MB. Free memory was 88.4MB in the beginning and 85.4MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1332.36ms. Allocated memory was 163.6MB in the beginning and 203.4MB in the end (delta: 39.8MB). Free memory was 85.4MB in the beginning and 148.4MB in the end (delta: -62.9MB). Peak memory consumption was 32.0MB. Max. memory is 16.1GB. * TraceAbstraction took 9465.58ms. Allocated memory was 203.4MB in the beginning and 245.4MB in the end (delta: 41.9MB). Free memory was 147.4MB in the beginning and 116.9MB in the end (delta: 30.5MB). Peak memory consumption was 73.4MB. Max. memory is 16.1GB. * Witness Printer took 102.05ms. Allocated memory is still 245.4MB. Free memory was 116.9MB in the beginning and 108.5MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre48 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre50 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre48 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre50 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 940]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(400)]; [L936] 0 static unsigned int arr[(400)]; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1019] 0 pthread_t id1, id2; [L1021] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={6:0}, id2={5:0}, m={4:0}, top=0] [L988] 1 int i; [L989] 1 unsigned int tmp; [L990] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L990] COND TRUE 1 i<(400) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1022] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={6:0}, id2={5:0}, m={4:0}, top=0] [L1004] 2 int i; [L1005] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L993] 1 tmp = __VERIFIER_nondet_uint() [L994] CALL 1 assume_abort_if_not(tmp < (400)) [L23] COND FALSE 1 !(!cond) [L994] RET 1 assume_abort_if_not(tmp < (400)) [L995] CALL, EXPR 1 push(arr,tmp) [L960] COND FALSE 1 !(top==(400)) [L967] CALL, EXPR 1 get_top() [L952] 1 return top; [L967] RET, EXPR 1 get_top() [L967] 1 stack[get_top()] = x [L968] CALL 1 inc_top() [L944] 1 top++ [L968] RET 1 inc_top() [L970] 1 return 0; [L995] RET, EXPR 1 push(arr,tmp) [L995] COND FALSE 1 !(push(arr,tmp)==(-1)) [L997] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=7, top=1] [L1005] COND TRUE 2 i<(400) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND FALSE 2 !(get_top()==0) [L981] CALL 2 dec_top() [L948] 2 top-- [L981] RET 2 dec_top() [L982] CALL, EXPR 2 get_top() [L952] 2 return top; [L982] RET, EXPR 2 get_top() [L982] EXPR 2 stack[get_top()] [L982] 2 return stack[get_top()]; [L1010] RET, EXPR 2 pop(arr) [L1010] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1005] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1005] COND TRUE 2 i<(400) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND TRUE 2 get_top()==0 [L977] 2 return (-2); [L1010] RET, EXPR 2 pop(arr) [L1010] COND TRUE 2 !(pop(arr)!=(-2)) [L1011] CALL 2 error() [L940] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1021]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 940]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 56 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 9.2s, OverallIterations: 7, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 616 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 613 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 36 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 998 IncrementalHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 36 mSolverCounterUnsat, 0 mSDtfsCounter, 998 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 110 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=506occurred in iteration=6, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 159 NumberOfCodeBlocks, 159 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 164 ConstructedInterpolants, 0 QuantifiedInterpolants, 1543 SizeOfPredicates, 16 NumberOfNonLiveVariables, 345 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 0/30 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-24 21:38:32,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73c32bb-c54f-439f-aeab-ab574c5834c7/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE